| The Muscular System is manifested by the presence of the
Spirit in the physical body. Muscles generate physical movement from chemical
energy. Muscles also help move food through the digestive system, circulate
blood, generate heat and many other functions. The three types of muscles
are skeletal muscle, cardiac muscle and smooth muscle.
Skeletal muscle is voluntary muscle that enables us to maintain body posture, movement of the skeleton, achieve locomotion and movement of a few organs such as the eye and tongue. The diaphragm is also made of skeletal muscle and is both voluntary and involuntary. Skeletal muscles are attached to the skeleton by tendons. Cardiac muscle composes the involuntary organ of the heart. The heart beat is produced by a tissue that has special properties. This tissue is located in the right upper chamber or atrium of the heart. The brain sends impulses to this center which is like a natural pacemaker, firing off electrical impulses that cause the muscles to contract and the blood to circulate. The muscular control of the viscera (organs of the chest and abdomen) is possible because of smooth muscle. Muscles that control the movement of the digestive system, respiratory, reproductive organs, blood vessels etc. are all smooth muscles. The Sense of Sight
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